Cleaner

Abstract

A cleaner includes: a suction motor that generates suction force; a dust separation unit disposed under the suction motor and separates dust from air; a handle disposed behind the suction motor; and a battery disposed under the handle and behind the dust separation unit to supply power to the suction motor.

What is claimed is: 
     
       1. A cleaner comprising:
 a suction unit that extends along a longitudinal axis and is configured to receive air; 
 a dust separation unit configured to separate dust from the air received through the suction unit; 
 a dust container that is connected to the suction unit and accommodates the dust separation unit; 
 an impeller configured to rotate about a rotational axis to thereby introduce air and dust to the dust separation unit; and 
 a first filter disposed in an air flow path that is defined between the dust separation unit and the impeller, the first filter surrounding the impeller, 
 wherein the first filter comprises:
 a circumferential filtering portion that extends in a circumferential direction and is radially spaced apart from the rotational axis of the impeller, and 
 a horizontal filtering portion that extends in a radial direction from the rotational axis of the impeller to the circumferential filtering portion, and 
 wherein the circumferential filtering portion and the horizontal filtering portion define a recessed space that accommodates the impeller. 
 
 
     
     
       2. The cleaner of  claim 1 , further comprising:
 a motor housing that accommodates the impeller; 
 a discharge cover coupled to the motor housing; and 
 a second filter disposed in the discharge cover and configured to transmit air discharged from the impeller, 
 wherein the first filter and the second filter are configured to be installed inside the motor housing and to be separated fro the motor housing along the rotational axis of the impeller. 
 
     
     
       3. The cleaner of  claim 2 , wherein the second filter is configured to be separated from the cleaner in a direction away from at least one of the motor housing, the dust container, or the dust separation unit, and
 wherein the first filter is configured to, based on the second filter being separated from the cleaner, be exposed to an outside of the cleaner. 
 
     
     
       4. The cleaner of  claim 1 , further comprising:
 a housing that accommodates the impeller and defines a part of an exterior of the cleaner; 
 a discharge cover coupled to the housing; and 
 a second filter disposed in the discharge cover and configured to transmit air discharged from the impeller, 
 wherein the second filter is arranged in the radial direction of the rotation axis of the impeller. 
 
     
     
       5. The cleaner of  claim 4 , wherein a diameter of the second filter is greater than a diameter of the first filter, and
 wherein the second filter is positioned above the first filter based on the dust container facing a ground. 
 
     
     
       6. The cleaner of  claim 4 , wherein the discharge cover defines an air exit in communication with the second filter. 
     
     
       7. The cleaner of  claim 6 , further comprising:
 a filter cover that defines at least one opening and is configured to support the second filter. 
 
     
     
       8. The cleaner of  claim 4 , wherein the first filter includes a pre-filter, and the second filter includes a HEPA High Efficiency Particulate Air) filter. 
     
     
       9. The cleaner of  claim 1 , wherein the first filter has:
 a horizontal surface perpendicular to the rotational axis of the impeller; and 
 a circumferential surface extending from the horizontal surface along a circumferential direction of the impeller. 
 
     
     
       10. The cleaner of  claim 1 , wherein the first filter has a dome shape defined by the circumferential filtering portion and the horizontal filtering portion. 
     
     
       11. The cleaner of  claim 1 , wherein the dust separation unit comprises:
 a first cyclone unit configured to separate first dust from the air received through the suction unit; 
 a second cyclone unit configured to separate second dust from the air passing through the first cyclone unit; and 
 a dust storage guide that is coupled to the second cyclone unit and partitions an internal space of the dust container into a first dust storage and a second dust storage. 
 
     
     
       12. The cleaner of  claim 11 , further comprising a body cover disposed at a surface of the dust container,
 wherein the dust storage guide extends to and contact the body cover. 
 
     
     
       13. The cleaner of  claim 11 , wherein the first dust storage is defined between an inner circumferential surface of the dust container and the dust storage guide and is configured to store the first dust separated by the first cyclone unit, and
 wherein the second dust storage is defined at an inside of the dust storage guide and configured to store the second dust separated by the second cyclone unit. 
 
     
     
       14. The cleaner of  claim 11 , wherein the first cyclone unit is configured to generate a first cyclonic flow having a first axis that extends parallel to the rotational axis of the impeller. 
     
     
       15. The cleaner of  claim 14 , wherein the first axis of the first cyclonic flow is coaxial with the rotational axis of the impeller. 
     
     
       16. The cleaner of  claim 14 , wherein the second cyclone unit is configured to generate a second cyclonic flow having a second axis that extends parallel to the rotational axis of the impeller. 
     
     
       17. The cleaner of  claim 16 , wherein the second cyclone unit is disposed within an inside of the first cyclone unit. 
     
     
       18. The cleaner of  claim 1 , wherein the rotational axis of the impeller passes through a center of the dust container and a center of the dust separation unit. 
     
     
       19. The cleaner of  claim 1 ,
 wherein the horizontal filtering portion is perpendicular to the rotational axis of the impeller; and 
 wherein the circumferential filtering portion has a curved shape corresponding to a blade of the impeller disposed at an outer surface of the impeller.